Nope. If you get to the Intnl Gateway, right at 8, you will get to the front of Epcot by about 8:30. Then, up the monorail platform and wait for the next monorail...could be 15 mins. Then, the 10 min ride to MK, then transfer to the express line..could take up to 15 mins.
If you want to get to MK for rope drop, from BC, get on a MK bus by 8am. That should get you there in plenty of time, without all that walking.